标题： 基于三角烯的超原子石墨烯中的半金属性 显示英文标题

标题： Half-Metallicity in Triangulene-based Superatomic Graphene

摘要： 二维（2D）磁体的发现为将自旋电子器件缩小到单层极限开辟了新的可能性。 二维半金属在自旋轨道耦合较小时能够传导完全自旋极化的电流，这为其提高器件性能提供了关键优势。 已经进行了大量理论研究以发现二维半金属，但其实现仍然难以捉摸。 在此，我们报告了超原子石墨烯的自下而上合成及其半金属特性的展示。 生产的石墨烯半金属是通过一种表面合成方法制造的，其构建块为磷掺杂的三角烯。 扫描隧道显微镜测量揭示了其金属能带结构，并通过在不同磁场下的磁子激发确定了其铁磁性。 密度泛函理论模拟准确地捕捉了其半金属特性，揭示了自旋极化带来源于超原子石墨烯的p$_x,_y$-类似轨道。 我们的工作展示了固有的二维碳磁性，为在自旋电子学中利用其优势铺平了道路。 显示英文摘要

摘要： The discovery of two-dimensional (2D) magnets has opened up new possibilities for miniaturizing spintronic devices to the monolayer limit. 2D half-metals, capable of conducting fully spin-polarized currents when spin-orbit coupling is minimal, provide a key advantage in improving device performance. Extensive theoretical research has been carried out to discover 2D half-metals, yet their realization remains elusive. Here we report the bottom-up synthesis of superatomic graphene and the demonstration of its half-metallic properties. The produced graphene half-metal is fabricated through an on-surface synthetic approach with phosphorus-doped triangulene as its building block. Scanning tunneling microscopy measurements reveal its metallic band structures and identify its ferromagnetism through magnon excitation under varying magnetic fields. Density functional theory simulations accurately capture its half-metallic characteristics, uncovering the origin of spin-polarized bands from the p$_x,_y$-like orbital of superatomic graphene. Our work demonstrates intrinsic 2D carbon magnetism, paving the way for harnessing its advantages in spintronics.